For me jealosuy comes in my life when I start to compare myself to others. Maybe I see a friend of mine who seems to be happy and who laughs and talks about their succesful life. But this is only appearence. Maybe one person has a beautiful life, but also this person can struggle a lot sometimes. I think that everyone have their struggles, even if their life seems so beautiful and ok. So I think it's better to stop comparing yourself with others, and try to focus your energy on improving yourself. If you are jealous and envy others, maybe you have something in you life or about yourself that you dislike, maybe you want to change. Try to think what do you want to achieve to feel better with yourself.